Power supply



FIG. 1 is a front top perspective view of a power supply, showing a first embodiment of my new design;

FIG. 2 is a rear top perspective view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a right side elevation view thereof;

FIG. 7 is a top plan view thereof;

FIG. 8 is a bottom plan view thereof;

FIG. 9 is a front top perspective view of a power supply, showing a second embodiment of my new design;

FIG. 10 is a rear top perspective view thereof;

FIG. 11 is a front elevation view thereof;

FIG. 12 is a rear elevation view thereof;

FIG. 13 is a left side elevation view thereof;

FIG. 14 is a right side elevation view thereof;

FIG. 15 is a top plan view thereof; and,

FIG. 16 is a bottom plan view thereof. 

CLAIM The ornamental design for a power supply, as shown and described. 